下一步點寫?
再下一步點寫?
佢答案係:
xy ( 2x - 1 ) ( y + x )
唔知點計到=﹏=
更新1:
SORRY打漏左個x x(2xy² – y² ) – y(x² – 2x^3)
SORRY打漏左個x x(2xy² – y² ) – y(x² – 2x^3)
收錄日期: 2021-04-23 15:48:05
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061105000051KK03923